diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 4032bbc..954d1da 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -65,4 +65,8 @@ void displayMenu() {
 }
 int add(int num1, int num2) {
     return num1 + num2;
+}
+
+int subtract(int num1, int num2) {
+    return num1 - num2;
 }
\ No newline at end of file